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2025 Silverback

SIABLO CF GRX

A carbon frame gravel bike with high-end components and shimano grx 800 hydraulic disc brakes.
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Manufacturer Price

€2,999($3,488)
Weight20.9 lbs  
FrameCarbon
SuspensionRigid
ForkCarbon
Wheels700c Aluminum
Drivetrain1 × 12
GroupsetGRX 800
BrakesShimano GRX 800 Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
SIABLO CF GRX
Other Gravel bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

35 mph

SIABLO CF GRX

36 mph

Similar Bikes

Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Sizing
XXS

4'7" – 5'0"

XS

4'11" – 5'4"

SM

5'2" – 5'7"

MD

5'5" – 5'11"

LG

5'9" – 6'3"

Rider Fit Notes

None yet.

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Geometry
Specs
Build
Frame

Full Carbon Frame, Internal Cable Routing, Flat-mount Disc Brake Mounts. Supports 700C and 650B Wheelsize, including Internal Routed Dropper Post Compatible.

BB Standard: BSA, 68mm, Threaded

Tire Clearance: 50c

Color: Rainbow Pearl

Fork

700C Full Carbon Fork, 100x12mm Hub Spacing, for Internal Cable Routing, waterbottle and pannier mounts

Bottom Bracket

Shimano SM-BBR60, BSA68

Headset

Siablo CF Headset, for Internal Cable Routing. IS52/28.6 IS52/40

Stem

SURFACE Alloy Stem, 31.8mm, Rise ±7°

Handlebar

SURFACE Alloy Handlebar, Ø 31.8mm, Reach: 77mm, Drop: 128mm, Flare: 16°

Saddle

SURFACE Saddle, Steel Rails

Seatpost

SURFACE Alloy, Ø 27.2mm

Type: Rigid

Pedals

Not Included

Grips

Surface Handlebar Wrap, Suede Black, Plug with Expander Bolt

Groupset
Rear Derailleur

Shimano GRX RD-RX822, 12-Speed, 10-51T, Direct Attachment

Crank

Shimano GRX FC-RX820-1, 12-Speed, 40T

Shifters

Shimano GRX ST-RX820

Cassette

Shimano Deore CS-M6200, 12speed Hyperglide+, 10-51T

Chain

Shimno Deore CN-M6100 Chain, 12 Speed

Brakes

Shimano GRX BR-RX820 Hydraulic Disc, Resin Pad

Type: Shimano GRX 800 Hydraulic Disc

Wheels
Rims

F: SURFACE Alloy Rim, 21mm Internal Width, 30mm Depth, 28H

Front Hub

F: Shimano HB-RS470 Front Hub, 28H, 100mm OLD for 12mm Thru Type Axle (w/o Lock Ring)

Rear Hub

F: Shimano HB-RS470 Front Hub, 28H, 100mm OLD for 12mm Thru Type Axle (w/o Lock Ring)

Tires

Maxxis Rambler 700Cx40C, 60TPI, Silkshield, Tubeless Ready

Disc Rotors

Shimano SM-RT70 160mm, Centre-Lock

Rider Notes
Riders Also Viewed

First added June 16

Last updated January 31

Not listed for 118 days